Effects of ration size on preferred temperature of lake charr Salvelinus namaycush
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Abstract
I tested the effects of different ration sizes on preferred temperatures of yearling lake charr,Salvelinus namaycush, by feeding them for about 2 weeks on one of four rations and then allowing them to thermoregulate in a temporal thermal gradient for 2 to 3 days. Selected temperatures and ration were directly and linearly correlated: the larger the ration, the higher the temperature selected. Mean preferred temperatures at different rations (shown in parentheses as percent of body weight per day) were as follows: 9.2°C (0.3); 10.6°C (0.8); 11.7°C (2.0); and 12.6°C (5.5). While the shift to lower temperature, under restricted ration, would maximize food conversion efficiency, previous growth studies indicate that even lower selected temperature would have been more beneficial.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Effects of ration size on preferred temperature of lake charr Salvelinus namaycush |
| Series title | Environmental Biology of Fishes |
| DOI | 10.1007/BF00000830 |
| Volume | 14 |
| Issue | 2/3 |
| Year Published | 1985 |
| Language | English |
| Publisher | Springer |
| Contributing office(s) | Great Lakes Science Center |
| Description | 5 p. |
| First page | 227 |
| Last page | 231 |
| Online Only (Y/N) | N |
| Additional Online Files (Y/N) | N |
| Google Analytic Metrics | Metrics page |